Azaborolinyl matalicos complexes as catalysts of olefin polymerization.

摘要

It DESCRIBED a catalyst having the general formula (I) wherein L is a ligand having the formula (A). L 'is L, CP, CP *, indenyl, fluorenyl, NR2, OR or halogen, L can be bridged to L'; X is halogen, NR2, OR or C1 and C12, M is zirconium or hafnium, R is alkyl from C1 to C12 or aryl from C6 and C12, R1 is R, alkaryl from C6 and C12, aralkyl from C6 and C12, hydrogen or SI (R) 3, R2 is R1, halogen, COR, COOR, SOR or SOOR, R3 is R2, OR, N (R) 2, SR OR fused ring system, Cp is cyclopentadienyl, CP * ES pentamethylcyclopentadienyl , n is 0 to 3 and L8 IS OPTIONAL a Lewis base. Also it disclosed a method for preparing poly INA comprising polymerizing a monomer OF THE LEFINA USING A CATALYST AS THE ABOVE WHERE DESRITO M may be titanium, zirconium or hafnium.